[R] Power calculation

I am are currently evaluating risk factors associated with a virus A , incidence among patients with a follow-up sample of 312. Overall, the virus incidence rate is estimated at 4.7 per 100 pyr, 95% CI (3.0-7.4), with a total follow-up time of 383.9 person years and 18 incidence cases. How can I

Re: [R] (no subject)

correlation, or maybe a rank sum (Wilcoxon type) test against a directional alternative? (I'm not too sure, but package coin might have the latter). -pd On 15 Jan 2014, at 07:30 , Keniajin Wambui kiang...@gmail.com wrote: I am using R3.02 on WIndows 7 64bit. How can I test for trend across

[R] (no subject)

I am using R3.02 on WIndows 7 64bit. How can I test for trend across ordered groups. I am using `prop.trend.test` but it doesn't order into groups and doesn't give the expected output of `sum of ranks` , `z value`... I have this data set and am doing `prop.trend.test (birthweight2$lbw2

[R] Subscript out of bounds

I am using R3.0.2 on a windows 64 bit machine. I building a .rnw file from an .r file. I am using MikTex as the engine for latex. The function dtaStata - read.dta(core2.dta, convert.dates=TRUE) works well in .R but; When I try reading a dta (stata) file I get an error subscript out of bounds. The

Re: [R] Subscript out of bounds

--- Sent from my phone. Please excuse my brevity. Keniajin Wambui kiang...@gmail.com wrote: I am using R3.0.2 on a windows 64 bit machine. I building a .rnw file from an .r file. I am using MikTex as the engine for latex

Re: [R] Subscript out of bounds

Here is the error am getting Error: chunk 1 Error in tt[[ll[v]]] : subscript out of bounds Error in rle(filenames) : 'x' must be an atomic vector Calls: Anonymous - Anonymous - RweaveTryStop Execution halted On Wed, Nov 27, 2013 at 9:25 AM, Keniajin Wambui kiang...@gmail.com wrote: Dear Jeff

Re: [R] Bar Graph

+0300 Keniajin Wambui kiang...@gmail.com wrote: I am using R 3.0.2 on a 64 bit machine I have a data set from 1989-2002. The data has four variables serialno, date, admission ward, temperature and bcg scar. serialno admin_ward date_admn bcg_scar temp_axilla yr 70162Ward2 11-Oct-89

[R] Bar Graph

I am using R 3.0.2 on a 64 bit machine I have a data set from 1989-2002. The data has four variables serialno, date, admission ward, temperature and bcg scar. serialno admin_ward date_admn bcg_scar temp_axilla yr 70162Ward2 11-Oct-89 y 38.9 1989 70163 Ward1

[R] Fwd: Merge

-- Forwarded message -- From: Keniajin Wambui kiang...@gmail.com Date: Thu, May 23, 2013 at 11:36 AM Subject: Merge To: r-help@r-project.org I am using R 3.01 on R Studio to merge two data sets with approx 120 variables and the other with 140 variables but with a serialno